Valve reseating tool



Sept. 25, 1945. L. c. SHEPLER I VALVE RESEATING TOOL Filed Nov. 1:5, 1942 M N fia W ,oN 9 H/ 5 NH N INVENTOR.

r km v Patented Sept. 25, 1945 UNITED STATES PATENT OFFICE VALVE RESEATING TOOL Leonard C. Shepler, Peoria, Ill.

Application November 13, 1942, Serial No. 465,513

2 Claims.

My invention relates to valves and faucets, and has amon its objects and advantages the provision of an improved reseating tool.

In the accompanying drawing:

Figure 1 is a longitudinal sectional view of the reseating tool as it is applied to a valve;

Figure 2 is a view of the cutting face of the tool in diminished proportions;

Figure 3 is a side view of a guide;

Figure 4 is an end View of a feeder; and

Figure 5 is a face view of a spring supporting Washer.

In the embodiment selected for illustration, I make use of a shaft ll) provided with a cutter head l2 at one end thereof, which cutter head is provided with cutting teeth l4 for resurfacing the valve seat 16 in the valve body Hi. This shaft is of such diameter as to fit within the threaded valve stem bore 20 of the bonnet 22. Upon the shaft I0 is mounted a centering guide 24 having a conically shaped face 26 engageable with the tapered or rounded end face 28 on the usual cap 30 threadedly connected with the bonnet 22. The guide 24 fits loosely on the shaft ID.

The shaft I8 is threaded at 32 for threaded connection with a feeder 34 engageable with a slip joint 36 interposed between the feeder and the guide 24. To the outer end of the shaft I0 is detachably connected a handle 38 to facilitate rotation thereof.

In operation, the bonnet 22 is detached from the valve body [8 and the usual valve and valve stem removed. With the handle 38 detached from the shaft IE], the shaft is inserted through the bonnet and the cap 30. The cutter head I2 is held in cutting engagement with the valve seat It by reason of a compression spring 49 mounted on the shaft l0 and engaging a washer 42 resting against the face 44 in the bonnet 22. When the bonnet 22 is replaced on the valve body l8, the valve seat l6 may be cut through rotation of the shaft l0 through the medium of the handle 3B. The spring 49 applies cutting pressure to the cutter head l2. The depth of cut is limited by reason of the feeder 34. When the feeder 34, the slip joint 36, the guide 24 and the cap 30 are brought into firm engagement one with the other, the spring 40 is prevented from exerting further cutting pressure to the tool. Initially, the cutter head may be brought into engagement with the valve l6 and the feeder 34 set in such position as to allow the shaft ill to advance a predetermined distance. The spring action provides an effective and eflicient cutting pressure to the cutter head, and the tool may be quickly assembled with and detached from the cooperating valve parts.

The guide 24 is tapered in the direction of the slip joint 36 so as to have a relatively small slip joint engaging area. Thus the guide will be held firmly to the cap 30 and will remain in a stationary position notwithstanding rotation of the feeder 34.

Without further elaboration, the foregoing will so fully illustrate my invention, that others may, by applying current knowledge, readily adapt the same for use under variou conditions of service.

I claim:

1. A valve reseating tool for a valve structure having a valve seat, a detachable bonnet provided with a threaded opening for a valve stem arranged coaxially of the valve seat, and a cap threadedly connected with the bonnet, said tool comprising a shaft freely receivable in said threaded opening and having a cutter head engageable with said valve seat, a cutting feeder spring interposed between said cutter head and the bonnet to urge the cutter head into cuttin engagement with the valve seat, a guide mounted loosely on said shaft and having a conical face engageable with said cap to rotatably support the shaft, and a member threadedly connected with said shaft and engageable with said guide to limit the action of said compression spring, said guide being tapered in the direction of the feed limiting member to have a relatively small surface engageable with said member.

2. In a tool for reformin the valve seat of valve body having a conically tapered cap, a shaft having a seat cutter at its inner end and screw threads on its outer portion, a feed limiting member threadedly engaging the screw threaded portion of the shaft, a slip element loose on the shaft at the inner end of the feed limiting member, and a tubular guide loosely mounted on the shaft having its inner end fitted on the conical cap and its outer end diametrically reduced and bearing against the slip member.

LEONARD C. SHEPLER. 

